Union multiple polygons

[Denis Laprise]

Hi,

I'd like to union many polygons together (similar to ST_Union in PostGIS) and I'm running into performance issues using S2Polygon::InitToUnion successively on the aggregated union and each polygon. Is there a more efficient way to do this?

Thanks

Denis

[michael...@gmail.com]

Hi, you can try using next method: static std::unique_ptr<S2Polygon> DestructiveUnion(std::vector<std::unique_ptr<S2Polygon> > polygons).

Thanks,

Michael